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Structured Data Validator | Free Schema Markup Tester
Validate your website's structured data (JSON-LD, Microdata, RDFa). Ensure your markup is error-free and ready for Google's rich results and snippets.
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Guide sections for better results.
Schema & Structured DataWhy choose this tool?
100% Free
No signup, no limits, no hidden costs
Privacy First
All processing happens in your browser
Instant Results
No waiting, no server processing needed
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PrivateFocused Flow
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Introduction
The Structured Data Validator is an essential tool for validating JSON-LD, Microdata, and RDFa markup before deployment. It catches syntax errors, missing required fields, and compatibility issues that prevent your schema from triggering rich results in search engines like Google and Bing.
Written by Abhishek AdhikariLast updated: June 27, 2026
Why this tool is needed
This validator scans your structured data markup for syntax errors, validates required properties against schema.org specifications, checks Google rich result compatibility, and cross-references nested schema types. It provides detailed error reports with line numbers and specific fix recommendations for each issue found.
Role in SEO
Invalid structured data fails silently. Google won't display rich results for pages with broken schema, meaning you lose valuable real estate in search results. A single missing required property or syntax error can disqualify your entire page from rich snippet display. Regular validation ensures your markup investments actually deliver ROI through enhanced search visibility.
How to use it well
1) Fill the form inputs: - JSON-LD Snippet: e.g., <script type="application/ld+json">...</script> 2) Click "Validate" to process the inputs. 3) Review the Output panel. Copy or download results as needed.
Step 1
Step 1: Enter json-ld snippet
Pro tip: Use specific, audience‑aware phrasing (e.g., <script type="application/ld+json">...</script>).
Step 2
Step 2: Click Validate
Pro tip: Keep inputs focused; iterate quickly for improvements.
Step 3
Step 3: Review the output
Pro tip: Edit lightly to match brand voice and intent.
Frequently asked questions
What's the difference between schema.org validation and Google Rich Results validation?
Schema.org validation checks if your markup follows the official schema.org vocabulary and syntax rules. Google Rich Results validation goes further by checking if your markup meets Google's specific requirements for triggering rich results, which may include additional required properties not mandated by schema.org itself. Always validate for both.
Should I validate Microdata and JSON-LD separately?
Yes, these are different encoding formats and require separate validation. JSON-LD is embedded in a script tag and validated as JSON, while Microdata is embedded in HTML attributes. Our validator handles all formats independently and provides format-specific guidance for each.
How do I use Structured Data Validator | Test JSON-LD & Microdata?
1) Fill the form inputs: - JSON-LD Snippet: e.g., <script type="application/ld+json">...</script> 2) Click "Validate" to process the inputs. 3) Review the Output panel. Copy or download results as needed.
Is Structured Data Validator | Test JSON-LD & Microdata free?
Yes, it is free to use with no login. All processing happens in your browser.
Does it work on mobile?
Yes. The UI is mobile‑friendly and supports touch and keyboard.
What makes this better than competitors?
It is fast, simple, and focused on clear, reusable outputs with basic SEO guardrails.
How accurate is it?
Outputs reflect your inputs and templates. Review and edit for brand voice and specificity.
Can I customize tone and audience?
Yes. Provide context in inputs; adjust wording after generation as needed.
Is my data private?
Yes. Processing is local to your browser; we do not store inputs or outputs.
Can I download results?
Yes. Use the Download button to save outputs for reuse.
Example output
Sample Output: Validation Result: 3 Issues Found [ERROR] Line 12: Missing required property 'name' in type 'Organization' [SUGGESTION] Add 'name' property with your organization's official name [WARNING] Line 8: Property 'datePublished' format should be ISO 8601 [ACTUAL] "2024-01-15" → [RECOMMENDED] "2024-01-15T00:00:00Z" [INFO] Line 15: 'AggregateRating' detected without 'bestRating' [SUGGESTION] Add 'bestRating': 5 for complete rating specification
Best practices
- Validate every schema implementation before deploying to production
- Check both schema.org compliance AND Google's specific requirements separately
- Test nested schemas by validating the complete JSON-LD block together
- Use Google Search Console's Enhancements reports for ongoing monitoring
- Re-validate after any CMS updates, theme changes, or plugin installations
- Maintain a validation checklist for your most common schema types
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